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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* External Connector (extcon) framework
* - linux/include/linux/extcon.h for extcon consumer device driver.
*
* Copyright (C) 2015 Samsung Electronics
* Author: Chanwoo Choi <[email protected]>
*
* Copyright (C) 2012 Samsung Electronics
* Author: Donggeun Kim <[email protected]>
* Author: MyungJoo Ham <[email protected]>
*
* based on switch class driver
* Copyright (C) 2008 Google, Inc.
* Author: Mike Lockwood <[email protected]>
*/
#ifndef __LINUX_EXTCON_H__
#define __LINUX_EXTCON_H__
#include <linux/device.h>
/*
* Define the type of supported external connectors
*/
#define EXTCON_TYPE_USB BIT(0) /* USB connector */
#define EXTCON_TYPE_CHG BIT(1) /* Charger connector */
#define EXTCON_TYPE_JACK BIT(2) /* Jack connector */
#define EXTCON_TYPE_DISP BIT(3) /* Display connector */
#define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */
/*
* Define the unique id of supported external connectors
*/
#define EXTCON_NONE 0
/* USB external connector */
#define EXTCON_USB 1
#define EXTCON_USB_HOST 2
/*
* Charging external connector
*
* When one SDP charger connector was reported, we should also report
* the USB connector, which means EXTCON_CHG_USB_SDP should always
* appear together with EXTCON_USB. The same as ACA charger connector,
* EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
*
* The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
* current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
* least 1A of current at 5V.
*/
#define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
#define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
#define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
#define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
#define EXTCON_CHG_USB_FAST 9
#define EXTCON_CHG_USB_SLOW 10
#define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
#define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */
/* Jack external connector */
#define EXTCON_JACK_MICROPHONE 20
#define EXTCON_JACK_HEADPHONE 21
#define EXTCON_JACK_LINE_IN 22
#define EXTCON_JACK_LINE_OUT 23
#define EXTCON_JACK_VIDEO_IN 24
#define EXTCON_JACK_VIDEO_OUT 25
#define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
#define EXTCON_JACK_SPDIF_OUT 27
/* Display external connector */
#define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
#define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
#define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
#define EXTCON_DISP_VGA 43 /* Video Graphics Array */
#define EXTCON_DISP_DP 44 /* Display Port */
#define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
/* Miscellaneous external connector */
#define EXTCON_DOCK 60
#define EXTCON_JIG 61
#define EXTCON_MECHANICAL 62
#define EXTCON_NUM 63
/*
* Define the properties of supported external connectors.
*
* When adding the new extcon property, they *must* have
* the type/value/default information. Also, you *have to*
* modify the EXTCON_PROP_[type]_START/END definitions
* which mean the range of the supported properties
* for each extcon type.
*
* The naming style of property
* : EXTCON_PROP_[type]_[property name]
*
* EXTCON_PROP_USB_[property name] : USB property
* EXTCON_PROP_CHG_[property name] : Charger property
* EXTCON_PROP_JACK_[property name] : Jack property
* EXTCON_PROP_DISP_[property name] : Display property
*/
/*
* Properties of EXTCON_TYPE_USB.
*
* - EXTCON_PROP_USB_VBUS
* @type: integer (intval)
* @value: 0 (low) or 1 (high)
* @default: 0 (low)
* - EXTCON_PROP_USB_TYPEC_POLARITY
* @type: integer (intval)
* @value: 0 (normal) or 1 (flip)
* @default: 0 (normal)
* - EXTCON_PROP_USB_SS (SuperSpeed)
* @type: integer (intval)
* @value: 0 (USB/USB2) or 1 (USB3)
* @default: 0 (USB/USB2)
*
*/
#define EXTCON_PROP_USB_VBUS 0
#define EXTCON_PROP_USB_TYPEC_POLARITY 1
#define EXTCON_PROP_USB_SS 2
#define EXTCON_PROP_USB_MIN 0
#define EXTCON_PROP_USB_MAX 2
#define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
/* Properties of EXTCON_TYPE_CHG. */
#define EXTCON_PROP_CHG_MIN 50
#define EXTCON_PROP_CHG_MAX 50
#define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
/* Properties of EXTCON_TYPE_JACK. */
#define EXTCON_PROP_JACK_MIN 100
#define EXTCON_PROP_JACK_MAX 100
#define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
/*
* Properties of EXTCON_TYPE_DISP.
*
* - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
* @type: integer (intval)
* @value: 0 (no hpd) or 1 (hpd)
* @default: 0 (no hpd)
*
*/
#define EXTCON_PROP_DISP_HPD 150
/* Properties of EXTCON_TYPE_DISP. */
#define EXTCON_PROP_DISP_MIN 150
#define EXTCON_PROP_DISP_MAX 151
#define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
/*
* Define the type of property's value.
*
* Define the property's value as union type. Because each property
* would need the different data type to store it.
*/
union extcon_property_value {
int intval; /* type : integer (intval) */
};
struct extcon_dev;
#if IS_ENABLED(CONFIG_EXTCON)
/*
* Following APIs get the connected state of each external connector.
* The 'id' argument indicates the defined external connector.
*/
int extcon_get_state(struct extcon_dev *edev, unsigned int id);
/*
* Following APIs get the property of each external connector.
* The 'id' argument indicates the defined external connector
* and the 'prop' indicates the extcon property.
*
* And extcon_get_property_capability() get the capability of the property
* for each external connector. They are used to get the capability of the
* property of each external connector based on the id and property.
*/
int extcon_get_property(struct extcon_dev *edev, unsigned int id,
unsigned int prop,
union extcon_property_value *prop_val);
int extcon_get_property_capability(struct extcon_dev *edev,
unsigned int id, unsigned int prop);
/*
* Following APIs register the notifier block in order to detect
* the change of both state and property value for each external connector.
*
* extcon_register_notifier(*edev, id, *nb) : Register a notifier block
* for specific external connector of the extcon.
* extcon_register_notifier_all(*edev, *nb) : Register a notifier block
* for all supported external connectors of the extcon.
*/
int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
struct notifier_block *nb);
int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
struct notifier_block *nb);
int devm_extcon_register_notifier(struct device *dev,
struct extcon_dev *edev, unsigned int id,
struct notifier_block *nb);
void devm_extcon_unregister_notifier(struct device *dev,
struct extcon_dev *edev, unsigned int id,
struct notifier_block *nb);
int extcon_register_notifier_all(struct extcon_dev *edev,
struct notifier_block *nb);
int extcon_unregister_notifier_all(struct extcon_dev *edev,
struct notifier_block *nb);
int devm_extcon_register_notifier_all(struct device *dev,
struct extcon_dev *edev,
struct notifier_block *nb);
void devm_extcon_unregister_notifier_all(struct device *dev,
struct extcon_dev *edev,
struct notifier_block *nb);
/*
* Following APIs get the extcon_dev from devicetree or by through extcon name.
*/
struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
struct extcon_dev *extcon_find_edev_by_node(struct device_node *node);
struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
int index);
/* Following API get the name of extcon device. */
const char *extcon_get_edev_name(struct extcon_dev *edev);
#else /* CONFIG_EXTCON */
static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
{
return 0;
}
static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
unsigned int prop,
union extcon_property_value *prop_val)
{
return 0;
}
static inline int extcon_get_property_capability(struct extcon_dev *edev,
unsigned int id, unsigned int prop)
{
return 0;
}
static inline int extcon_register_notifier(struct extcon_dev *edev,
unsigned int id, struct notifier_block *nb)
{
return 0;
}
static inline int extcon_unregister_notifier(struct extcon_dev *edev,
unsigned int id, struct notifier_block *nb)
{
return 0;
}
static inline int devm_extcon_register_notifier(struct device *dev,
struct extcon_dev *edev, unsigned int id,
struct notifier_block *nb)
{
return -ENOSYS;
}
static inline void devm_extcon_unregister_notifier(struct device *dev,
struct extcon_dev *edev, unsigned int id,
struct notifier_block *nb) { }
static inline int extcon_register_notifier_all(struct extcon_dev *edev,
struct notifier_block *nb)
{
return 0;
}
static inline int extcon_unregister_notifier_all(struct extcon_dev *edev,
struct notifier_block *nb)
{
return 0;
}
static inline int devm_extcon_register_notifier_all(struct device *dev,
struct extcon_dev *edev,
struct notifier_block *nb)
{
return 0;
}
static inline void devm_extcon_unregister_notifier_all(struct device *dev,
struct extcon_dev *edev,
struct notifier_block *nb) { }
static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
{
return ERR_PTR(-ENODEV);
}
static inline struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
{
return ERR_PTR(-ENODEV);
}
static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
int index)
{
return ERR_PTR(-ENODEV);
}
static inline const char *extcon_get_edev_name(struct extcon_dev *edev)
{
return NULL;
}
#endif /* CONFIG_EXTCON */
/*
* Following structure and API are deprecated. EXTCON remains the function
* definition to prevent the build break.
*/
struct extcon_specific_cable_nb {
struct notifier_block *user_nb;
int cable_index;
struct extcon_dev *edev;
unsigned long previous_value;
};
static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
const char *extcon_name, const char *cable_name,
struct notifier_block *nb)
{
return -EINVAL;
}
static inline int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
{
return -EINVAL;
}
#endif /* __LINUX_EXTCON_H__ */
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